Summary of the invention
Technical problem to be solved by this invention is to overcome existing LED light fixture above shortcomings, and more evenly reflection surface self-cooling LED indoor illumination device of a kind of simple in structure, good heat dissipation effect, illumination is provided.The present invention is achieved through the following technical solutions:
A kind of reflection surface self-cooling LED indoor illumination device, comprise wiring board, LED and be used to reflect the reflection shield of LED light, the convex portions of the light-emitting area of described LED on the reflection shield, the LED welding in the circuit board, and leave the gap between wiring board and the convex surface, LED is between described convex surface and wiring board.
In the above-mentioned reflection surface self-cooling LED indoor illumination device, described convex surface is smooth surface (a non-rough convex surface).
In the above-mentioned reflection surface self-cooling LED indoor illumination device, described convex surface is by circular arc, hyperbola, and parabola, ellipse, or back translation is made up in its segmentation or rotation forms.
In the above-mentioned reflection surface self-cooling LED indoor illumination device, the light-emitting area of described LED is over against convex surface.
In the above-mentioned reflection surface self-cooling LED indoor illumination device, described wiring board scribbles reflector layer towards a side of convex surface.
In the above-mentioned reflection surface self-cooling LED indoor illumination device, described wiring board is an aluminium base, and LED directly is welded on the aluminium base.
In the above-mentioned reflection surface self-cooling LED indoor illumination device, described wiring board is connected with circuit power by lead, circuit power with and wiring board be spaced apart.
Illuminator of the present invention (LED) is arranged on described convex surface below with certain spacing, in any way LED is placed on the convex surface below, and convex surface is dispersed the light of LED, adds the reflection of reflector (side panel of reflection shield), makes light become even in spatial dimension.
LED is welded on the aluminium base of printed circuit, and aluminium base is derived the heat of LED fast.Described LED is towards the reflective surface of described reflection shield.
The front and the side of described wiring board scribble reflector layer.
The invention has the beneficial effects as follows:
Reflection shield of the present invention has adopted convex surface as reflective surface, but not rough reflective surface.Convex surface is that the LED light of relatively concentrating is dispersed, and concave surface is that the light of LED is assembled.Existing reflector also is that the light of LED is assembled, and reflection shield convex surface of the present invention is that the LED light of relatively concentrating is dispersed, the side light barrier is the light that reflection is launched from side, only combine with the plane with convex surface or convex surface, without concave surface, because of concave surface is that light is assembled, the global shape that the design is used for divergent rays is a reflection shield, is not traditional reflector.Even traditional reflector adopts scraggly convex surface also not reach effect of the present invention, because light is dispersed the back to be assembled light at two adjacent concave surface places of convex surface, and traditional bowl structure on the whole can further be assembled light again, and its reflective mechanism is different with the present invention with design concept.
Because several LED of the present invention are the reflective surface settings towards reflection shield, all light from led light source are reflections of this reflection shield of process earlier, directive ground again, therefore illumination is more even, LED penetrates very strong light on very little area, this high light is easy to injure human eye, and the general light of the high-power LED lamp that the design has effectively avoided common employing led light source to be provided with towards ground compares rendezvous problem.The reflective surface of described reflection shield is a convex surface, and the outer surface that utilizes convex surface has increased the reflection of light angle as light reflection surface, makes under the constant situation of total luminous flux ground, and light evenly disperses, and irradiation range enlarges.The wiring board that is welded with LED among the design exposes in air, forms good heat radiation and convection current, and power supply and LED separate placement simultaneously, and simple design has solved the heat dissipation problem of LED.
Because the front of circuit board of the present invention scribbles reflector layer, can reduce the barrier effect of this strip circuit plate to the reflected back reflection shield once more of the reflection ray on this strip circuit plate to greatest extent to light.
Because the present invention directly utilizes cross-ventilation to realize that radiating effect is splendid from heat radiation, efficiently solve the bad problem of closed LED light fixture heat radiation of common employing on-chip power, prolonged the service life of LED light fixture, and fitting structure is simple, can save material, reduces cost.
The specific embodiment
Consult Fig. 1 to shown in Figure 5, the preferred embodiment of a kind of reflection surface self-cooling LED indoor illumination device of the present invention, but embodiments of the present invention are not limited thereto.
In this example, the reflection surface self-cooling LED indoor illumination device main body is made up of reflection shield 1, illuminator 9, driving power 5 (for wiring board and LED provide power supply) and dividing plate 4, the end face 1a of reflection shield 1, promptly over against being of the convex surface of the opening of reflection shield 1 a columniform part (the crossing curve of the cross section of this convex surface and reflection shield is a circular arc), four sides of reflection shield are outward-dipping plane, one hole 7 is arranged on the left surface 1d, through hole as lead 6,3 holes are respectively arranged, as the patchhole of dividing plate 4 on leading flank 1b and the trailing flank 1c.The bar shaped illuminator be arranged on this end face 1a (being convex surface) under, illuminator 9 comprises strip circuit plate 2 (being wiring board), be welded on several LED3 on this strip circuit plate, LED is disposed on the bar shaped wiring board, and be positioned at the below of convex surface, dividing plate 4 is used to support bar shaped wiring board 2, this bar shaped illuminator 9 comprises strip circuit plate 2, be welded on several LED3 on this strip circuit plate, LED3 is in the face of the end face 1a of reflection shield, according to the actual illumination needs, the front of strip circuit plate 2 scribbles reflector layer.Driving power 5 (referring to Fig. 5) is arranged in the groove of end face 1a of reflection shield 1, and itself and wiring board are spaced apart, and links to each other with an end of strip circuit plate 2 with through hole 7 by lead 6.Wiring board adopts aluminium base in the present embodiment, and its shape can in conjunction with structure of the present invention, can realize better heat radiating effect by cross-ventilation for the shape of existing fin.
The reflective convex surface of reflection shield of the present invention (being the end face of reflection shield 1) can also be the part (as hemispherical) of sphere.Certainly, the reflective convex surface of reflection shield can also be other level and smooth curved surfaces, mainly is by circular arc, hyperbola, and parabola, ellipse, or it makes up translation or rotation forms.